Who are Brent's apprentices in Chapter 7 of the book Whirligig by Paul Fleischman?

Brent's
apprentices in Chapter 7 are a group of young children who happen to come around as he is
constructing his whirligig on the beach near the small town of Beale Beach, Florida.  At first
there are "seven or eight of them, all black, all grammar-school-aged except for one older
girl."  When they first arrive, they are just playing in the water nearby, then one of the
notices him, "call(s) to the others, and (leads) a noisy charge to investigate."  The
kids basically create havoc, blowing on Brent's harmonica, playing with his saw, and asking a
lot of questions. ...